tough..... to say, but the Great Southwest was predominantly Indian Language groups, Ute, Navajo, Apache,....and sometimes they didn’t speak Spanish. I would thing the 2nd language after English spoken in the USA was German. All over America there were German settlements, and in the north, it was Swedish and Norwegians. All of them quickly, including the Irish and Italian adapted to their new homeland and learned English. Wonder why it has taken SO LONG for the people in the southern parts of Texas to catch on. Visit Laredo, Texas and see the vast majority of people speak Spanish.
I understand what you’re saying.